When an electron of a hydrogen atom travels from n=4 to n=2, a photon of energy 4.165•10^-19 joules is released. calculate the wavelength associated with this radiation.

How many molecules of sucrose c12h22o11 are there in 454 grams of sucrose

How have the greenhouse gasses increased from the year 2000 to 2018

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.